global class MyScheduler implements Schedulable {
global void execute(SchedulableContext ctx) {
// The query used by the batch job.
String query = 'SELECT Id,CreatedDate FROM Merchandise__c ' +
'WHERE Id NOT IN (SELECT Merchandise__c FROM Line_Item__c)';
CleanUpRecords c = new CleanUpRecords(query);
Database.executeBatch(c);
}
}